PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the PSA Airlines Canadair Regional Jet Systems Exam. Study with comprehensive flashcards and multiple choice questions, each with hints and explanations. Get ready to excel!

Practice this question and more.


What condition must be detected by both loops in the dual loop fire detection system to indicate a fire?

  1. Only one loop detecting heat

  2. Both loops detecting an overheat condition

  3. Only APU loop detecting heat

  4. Both loops must fail to indicate fire

The correct answer is: Both loops detecting an overheat condition

For a dual loop fire detection system, both loops are designed to provide redundancy and increase reliability in fire detection. The correct condition indicating a fire occurs when both loops detect an overheat condition. This ensures that the fire detection system eliminates the likelihood of false positives or negatives. Each loop operates independently, and the requirement for both to show an overheat condition before confirming a fire helps in enhancing safety protocols. This means that even if one loop may detect a false alarm or a non-critical fault, the second loop's detection must also indicate an overheat for the system to declare a fire officially. This dual confirmation mechanism is critical in aircraft systems to prevent unnecessary responses to potential threats that may not exist. In scenarios where only one loop detects heat or conditions where only the APU loop is involved, those do not satisfy the criteria for indicating an actual fire, as confirmation from both loops is essential. If both loops fail, this situation would not result in a fire indication but rather would signify a malfunction within the system itself.